A JHK_s false-color image of the HR 4796 A ring, showing its relative reflectivity, as estimated in Sect. 4.4. North is up and east is to the left. The J, H and K_s-bands are colored blue, green and red, respectively. The unsaturated star is normalized to one in all the bands and appears white in the image. The ring appears yellow because it reflects light more efficiently in the H and K_s-bands than in the J-band. The noise-dominated regions with 0.2′′ to 0.5′′ separation from the star are not shown. Regions away from the ring are colored white and given the median intensity of the three bands.